摘要
根据基本轨与尖轨的相对位置及轨下支撑方式,分析车轮与转辙器钢轨的接触特性,在考虑尖轨与基本轨相对运动的基础上,提出铁路道岔转辙器部件轮轨两点接触的计算方法,以18号单开道岔为例,对比分析了标准和磨耗车轮LMA踏面与钢轨匹配时的轮轨接触特性,验证两点接触计算方法的正确性和可行性。研究表明:车轮踏面磨耗后,轮轨接触点位置更多的位于尖轨轨距角附近,会增大尖轨的侧面磨耗;车轮踏面磨耗会导致轮载转移的位置后移,增大车辆进入道岔时轮对蛇形运动的距离和幅度,进而导致横向轮轨动力相互作用的增大;磨耗后的车轮踏面,其轮轨两点接触的可能区域分布较为分散,可能造成轮轨接触点的无规律跳跃,从而引起较大的轮轨冲击振动作用。
The wheel-rail contact characteristics in switch panel of railway turnout were studied based on the relative positions of switch/stock rail and the difference of rail foundation.Considering the relative motion of switch/stock rails, a new method to determine the wheel-rail two-point contact was presented in this paper.In the case of Chinese No.18 single turnout, the wheel-rail contact characteristics between LMA wheel tread and rails were compared and analyzed, while the standard and worn wheel treads were used in the calculation process.The correctness and feasibility of wheel-rail two-point contact calculation method were verified by the results.The results show that for the worn wheel profile, the wheel-rail contact points are located closer to the gauge corner of the switch rail, which will increase the side wear of the switch rail.The wheel tread wear will cause the position of the wheel load transition to shift backward, which will increase the distance and amplitude of wheel-set hunting motion when the vehicle enters the turnout, and thus increase the lateral dynamic interaction between wheel and rail.The possible region of wheel-rail two-point contact is more scattered with the worn wheel profile, which may cause the wheel-rail contact points to skip irregularly, causing greater impact and vibration between the wheel and rail.
作者
马晓川
徐井芒
王平
陈漫
胡辰阳
王健
MA Xiaochuan;XU Jingmang;WANG Ping;CHEN Man;HU Chenyang;WANG Jian(Engineering Research Center of Railway Environment Vibration and Noise,Ministry of Education, East China Jiaotong University, Nanchang 330013, China;MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2019年第7期155-161,共7页
Journal of the China Railway Society
基金
国家自然科学基金(51425804,51608459,U1734207)
江西省教育厅科学技术研究项目(GJJ180338)
关键词
铁路道岔
尖基轨相对运动
轮轨两点接触
轮载转移
railway turnout
relative motion of switch/stock rail
wheel-rail two-point contact
wheel load transfer
